CN110905990B - Differential mechanism for improving bearing lubrication of differential mechanism and lubrication method - Google Patents
Differential mechanism for improving bearing lubrication of differential mechanism and lubrication method Download PDFInfo
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- CN110905990B CN110905990B CN201911174816.5A CN201911174816A CN110905990B CN 110905990 B CN110905990 B CN 110905990B CN 201911174816 A CN201911174816 A CN 201911174816A CN 110905990 B CN110905990 B CN 110905990B
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- differential
- bearing
- lubrication
- spiral
- spiral rib
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
- F16H48/40—Constructional details characterised by features of the rotating cases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0469—Bearings or seals
- F16H57/0471—Bearing
Abstract
The invention discloses a differential gear for improving the lubrication of a differential gear bearing and a lubrication method thereof, wherein the differential gear comprises a differential gear body and a differential gear shell, wherein a bearing is arranged on one side of the differential gear shell, which is far away from the differential gear body; the differential mechanism shell is provided with a spiral rib, and the arrangement direction of the spiral rib is determined according to the rotation direction of the differential mechanism shell; the spiral rib extends from the joint of the differential case and the differential body in the direction of the bearing along the outer peripheral surface of the differential case; the spiral ribs gradually decrease in size from the differential body to the bearing; according to the invention, the spiral rib is additionally arranged on the differential shell, so that lubricating oil in the box body can be thrown into the bearing on the corresponding side along the rotating direction of the spiral rib by the spiral rib; under the condition of not increasing oil quantity and an active lubricating system, the problem of lubricating a differential bearing under a low-speed working condition is solved.
Description
Technical Field
The invention relates to the technical field of differentials, in particular to a differential with improved differential bearing lubrication and a lubrication method.
Background
The automobile differential mechanism can realize a mechanism that left and right (or front and rear) driving wheels rotate at different rotating speeds. Mainly comprises a left half shaft gear, a right half shaft gear, two planet gears and a gear carrier. Under the working conditions of normal running or high rotating speed of the vehicle, the differential can continuously obtain lubrication of lubricating oil, and a bearing in the differential shell can also be well lubricated; however, when the vehicle is parked or idled for a long time, the differential gear is stopped to cause lubrication failure, so that the lubricating oil adhered to the input shaft bearing is short, and thus, the probability of the input shaft bearing failing due to insufficient lubrication is liable to increase during the period when the lubrication based on the differential gear is failed.
In order to ensure that a differential bearing obtains good lubrication under the condition of low-speed operation, the conventional gearbox, reduction gearbox or gear box increases the oil adding amount and raises the oil level in the box body; or the problem of lubrication of the differential bearing under the low-speed working condition is solved by adding an active lubrication system. Although both of these approaches address the problem of differential bearing lubrication in low speed conditions, they have their own drawbacks. Increasing the oil adding amount and the oil level can increase the oil stirring loss of the gear and reduce the transmission efficiency of the whole machine; the addition of the active lubrication system increases the complexity of the system, reduces the reliability of the whole machine to a certain extent, and increases the cost.
For example, in 2019, the chinese patent application (publication No. CN109944928A) discloses a bearing lubrication mechanism of a transmission and a transmission. A bearing lubrication mechanism for a transmission, comprising: the transmission comprises a transmission shell, an input shaft bearing, a differential gear, an input shaft gear, an oil collecting tank and an oil stirring wheel. Wherein, the oil collecting groove has an oil storage state and an oil discharge state. Therefore, the oil stirring wheel can stir the lubricating oil in the oil collecting tank to carry out splash lubrication on the input shaft bearing; even if the splash lubrication based on the differential gear is lost due to the long-term parking or idling of the vehicle, the churning wheel can perform the splash lubrication on the input shaft bearing with the lubricating oil in the oil sump in response to the rotation of the input shaft. It can be seen that in order to fully lubricate the bearing under the low-speed working condition, a more complex oil stirring and collecting structure is designed, and the total amount of lubricating oil is increased to a certain extent.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a differential and a method for improving the lubrication of a differential bearing, which solve the lubrication problem of the differential bearing under the low-speed working condition under the conditions of not increasing the oil filling amount and a complex active lubrication system.
In order to achieve the purpose, the invention adopts the technical scheme that:
a differential mechanism for improving the lubrication of a differential mechanism bearing comprises a differential mechanism body and a differential mechanism shell, wherein a bearing is arranged on one side, far away from the differential mechanism body, of the differential mechanism shell; the differential mechanism shell is provided with a spiral rib, and the arrangement direction of the spiral rib is determined according to the rotation direction of the differential mechanism shell; the spiral rib extends from the joint of the differential case and the differential body in the direction of the bearing along the outer peripheral surface of the differential case; the spiral ribs gradually decrease in size from the differential body to the bearing.
The differential mechanism is characterized in that the spiral ribs are added on the differential mechanism shell, and the spiral ribs on the differential mechanism shell can be added on the differential mechanism shell on the single differential mechanism bearing side or simultaneously added on the differential mechanism shells on the two differential mechanism bearing sides according to the structural characteristics and the working condition requirements of the differential mechanisms of different models; the direction of the spiral rib is set according to the main rotating direction of the differential case, so that when the differential rotates, the spiral rib on the differential case can throw lubricating oil in the box body to the bearings on the corresponding sides along the rotating direction of the spiral rib; the number of the spiral ribs can be correspondingly adjusted according to the structural characteristics and working condition requirements of the differentials of different models.
The differential and the spiral rib well utilize the centrifugal force in a low-speed rotating state to throw the lubricating oil in the box body into the bearing along the spiral extending direction of the spiral rib; the spiral ribs play a role in guiding and providing a motion path of lubricating oil; the spiral ribs with gradually reduced size close to the bearing are convenient for the concentration and throwing-out of lubricating oil.
It should be noted that the low-speed rotation state is the speed (thousands of revolutions per minute) of normal rotation relative to the differential assembly, and the low-speed rotation here also has 600 revolutions per minute, and the centrifugal force provided under normal conditions is not enough to throw out the lubricating oil in the case, but due to the arrangement of the spiral rib structure, the lubricating oil can be thrown out along the spiral rib, so as to achieve the purpose which cannot be achieved under the original conditions.
In addition, the arrangement of the spiral ribs can also enhance the connection strength and stability of the differential shell and the differential body, and the reliability of the whole machine is improved.
Further, the number of spiral muscle is 1 ~ 4, staggers opening and through-hole setting on the differential mechanism casing.
Furthermore, the number of the spiral ribs is two, and the spiral ribs are arranged around the central axis of the differential shell in a central symmetry mode.
Furthermore, the inner side of the spiral rib is a curved surface matched with the outer contour surface of the differential shell; the outer contour of the spiral rib is spiral and is provided with a rib back with reduced size. The rib back is beneficial to the lubricating oil to move to the top along the bottom of the spiral rib, and the lubricating oil is thrown out and falls into the bearing after moving to the position near the bearing.
Further, the spiral rib is opposite to the rotation direction of the differential case along the spiral direction of the differential case; the spiral extending direction of the spiral ribs and the central axis direction of the differential shell are inclined by 10-45 degrees.
That is to say, the spiral rib is along the periphery slope setting of differential mechanism casing, for lubricating oil provides favourable motion orbit, accords with when differential mechanism rotates, and lubricating oil moves to the rear under the effect of centrifugal force.
Furthermore, one end of the spiral rib is provided with a connecting piece, and the other end of the spiral rib is provided with a cylindrical pin; the connecting piece is provided with a screw hole and is connected to the differential mechanism body through a bolt; and the differential shell is provided with a pin hole matched with the cylindrical pin, and the cylindrical pin is arranged in the pin hole.
The spiral muscle one end is passed through the spiro union, the mode that the pin joint was passed through to one end, and the assembly and the dismantlement of being convenient for, the easily batch production of independent fashioned spiral muscle and processing can maintain and change as accessories.
Further, the spiral rib is integrally formed on the differential case through casting, forging or 3D printing. Adopt with differential mechanism casing integrated into one piece's mode, be favorable to improving connection and fixed strength, promote stability.
Furthermore, the spiral ribs are integrally formed and then connected to the differential case in a welding mode.
Furthermore, an oil guide groove which is consistent with the extending direction of the spiral rib is arranged on the outer contour of the spiral rib. Facilitating the movement of the lubricating oil along the spiral rib.
Further, a method for lubricating a differential with the improved lubrication of the differential bearings comprises arranging spiral ribs on a differential housing and throwing lubricating oil into the differential bearings on the sides of the spiral ribs by the spiral ribs at a low oil level and/or a low rotating speed when the differential is mounted in a gearbox, a reduction gearbox or a gearbox.
Compared with the prior art, the invention has the beneficial effects that: 1. the invention solves the problem of lubricating the differential bearing under the low-speed working condition by adding the spiral rib on the differential shell under the conditions of not increasing oil quantity and an active lubricating system;
2. the arrangement direction of the spiral ribs is matched with the main rotation direction of the differential case, so that when the differential rotates, the spiral ribs can throw lubricating oil in the case into the bearings on the corresponding sides along the rotation direction of the spiral ribs;
3. the spiral ribs are easy to install and arrange in the differential mechanism, so that the normal operation of other parts of the differential mechanism is not influenced, and the burden of the whole differential mechanism is not increased;
4. the arrangement of the spiral ribs can also enhance the connection strength and stability of the differential shell and the differential body, and the reliability of the whole machine is improved.
Drawings
FIG. 1 is a first schematic perspective view of a differential for improving bearing lubrication of the differential of the present invention;
FIG. 2 is a schematic perspective view of a differential for improving bearing lubrication of the differential of the present invention;
FIG. 3 is a schematic view of a helical rib configuration of a differential for improved differential bearing lubrication in accordance with the present invention;
in the figure: 1. a differential body; 2. a differential housing; 3. a bearing; 4. a spiral rib; 401. a rib back; 402. a cylindrical pin; 403. connecting sheets; 404. a screw hole; 5. a connecting bolt; and F is the differential rotation direction.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1 and 2, a differential for improving the lubrication of differential bearings comprises a differential body 1 and a differential case 2, wherein a bearing 3 is arranged on one side of the differential case 2 far away from the differential body 1; the differential case 2 is provided with a spiral rib 4, and the arrangement direction of the spiral rib 4 is determined according to the rotation direction of the differential case 2; the spiral ribs 4 extend from the junction of the differential case 2 and the differential body 1 in the direction of the bearing 3 along the outer peripheral surface of the differential case 2; the spiral ribs 4 are gradually reduced in size from the differential body 1 to the bearing 3.
The differential mechanism is additionally provided with the spiral rib 4 on the differential mechanism shell, so that when the differential mechanism rotates, the spiral rib 4 on the differential mechanism shell 2 can throw lubricating oil in a box body into the bearing 3 on the corresponding side along the rotating direction of the spiral rib 4; the number of the spiral ribs 4 can be correspondingly adjusted according to the structural characteristics and working condition requirements of the differentials of different models.
The differential and the spiral rib 4 well utilize the centrifugal force in a low-speed rotating state to throw the lubricating oil in the box body into the bearing 3 along the spiral extending direction of the spiral rib 4; the spiral rib 4 plays a role in guiding and providing a motion path of lubricating oil; the spiral ribs 4 with gradually reduced size close to the bearing are convenient for the concentration and throwing-out of lubricating oil.
In the embodiment, the oil level in the tank body is low, and the rotating speed is 500 rpm; due to the presence of the spiral rib 4, the lubricating oil can be thrown out by centrifugal force under the action of the rotating speed.
In addition, the arrangement of the spiral ribs 4 can also enhance the connection strength and stability of the differential case 2 and the differential body 1, and the reliability of the whole machine is improved.
Furthermore, the number of the spiral ribs 4 is two, and the spiral ribs are symmetrically arranged around the central axis of the differential case 2 and staggered with the openings and the through holes on the differential case.
The spiral muscle 4 that the symmetry set up can be thrown lubricating oil into the bearing 3 of corresponding side from both sides, further improves the lubricated effect of bearing 3.
Further, the inner side of the spiral rib 4 is a curved surface matched with the outer contour surface of the differential case 2; the outer contour of the spiral rib 4 is spiral and has a rib back 401 with reduced size. The rib back 401 facilitates the lubricant to move along the bottom of the spiral rib 4 to the top, and then to be thrown out and fall into the bearing after moving to the vicinity of the bearing.
Further, the spiral ribs 4 are arranged in a direction opposite to the direction in which the differential case 2 rotates; the extending direction of the spiral rib 4 and the central axis direction of the differential case 2 are inclined by 30 degrees.
That is, the spiral rib 4 is obliquely arranged along the outer peripheral surface of the differential case 2, so as to provide a favorable movement track for the lubricating oil, and the lubricating oil moves backwards under the action of centrifugal force when the differential rotates.
Further, as shown in fig. 3, one end of the spiral rib 4 is provided with a connecting piece 403, and the other end is provided with a cylindrical pin 402; the connecting piece 403 is provided with a screw hole 404 which is connected to the differential body 1 through a connecting bolt 5; the differential case 2 is provided with pin holes matched with the cylindrical pins 402, and the cylindrical pins 402 are installed in the pin holes.
4 one end of spiral muscle is passed through the spiro union, the mode that the pin joint was passed through to one end, and the assembly and the dismantlement of being convenient for, the easy batch production of independent fashioned spiral muscle 4 and processing can maintain and change as accessories.
Furthermore, an oil guide groove which is consistent with the extending direction of the spiral rib 4 is arranged on the outer contour of the spiral rib 4. Facilitating the movement of the lubricating oil along the spiral rib 4.
Example two:
the difference between this embodiment and the first embodiment is that the spiral ribs are connected in a different manner.
Specifically, the spiral rib 4 is integrally formed on the differential case 2 by casting, forging or 3D printing. Adopt with differential mechanism casing 2 integrated into one piece's mode, be favorable to improving connection and fixed strength, promote stability.
Example three:
the embodiment provides a lubricating method for improving the lubrication of a differential bearing, which comprises throwing lubricating oil into the differential bearing on the side of a spiral rib by arranging the spiral rib on a differential shell at a relatively low oil level and a low rotating speed when the differential is installed in a gearbox, a reduction gearbox or a gear box.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A differential mechanism for improving the lubrication of a differential mechanism bearing comprises a differential mechanism body and a differential mechanism shell, wherein a bearing is arranged on one side, far away from the differential mechanism body, of the differential mechanism shell; the differential mechanism is characterized in that a spiral rib is arranged on the differential mechanism shell, and the arrangement direction of the spiral rib is determined according to the rotation direction of the differential mechanism shell; the spiral rib extends from the joint of the differential case and the differential body in the direction of the bearing along the outer peripheral surface of the differential case; the spiral ribs gradually decrease in size from the differential body to the bearing; the spiral extending direction of the spiral ribs and the central axis direction of the differential shell are inclined by 10-45 degrees.
2. The differential for improving lubrication of a differential bearing as claimed in claim 1, wherein said number of said spiral ribs is 1-4, and said openings and through holes in said differential case are staggered.
3. The differential for improving lubrication of a differential bearing as defined in claim 1, wherein said helical ribs are two and are disposed symmetrically about a central axis of said differential case.
4. A differential for improving the lubrication of a differential bearing as defined in claim 1, wherein said helical ribs are curved on the inside to match the outer contoured surface of said differential case; the outer contour of the spiral rib is spiral and is provided with a rib back with reduced size.
5. A differential for improving the lubrication of a differential bearing as defined in claim 1, wherein said helical ribs are oriented in a helical direction of said differential case opposite to the direction of rotation of said differential case.
6. A differential gear for improving the lubrication of a differential gear bearing according to any one of claims 1 to 5, wherein one end of the spiral rib is provided with a connecting piece, and the other end is provided with a cylindrical pin; the connecting piece is provided with a screw hole and is connected to the differential mechanism body through a bolt; and the differential shell is provided with a pin hole matched with the cylindrical pin, and the cylindrical pin is arranged in the pin hole.
7. A differential for improving the lubrication of a differential bearing as claimed in any one of claims 1 to 5, wherein said helical ribs are integrally formed on said differential case by casting, forging or 3D printing.
8. A differential for improving the lubrication of a differential bearing as claimed in any one of claims 1 to 5, wherein said helical ribs are integrally formed and then welded to said differential case.
9. A differential gear for improving the lubrication of a differential bearing according to any one of claims 1 to 5, wherein the outer profile of the spiral rib is provided with oil guide grooves which are aligned with the extending direction of the spiral rib.
10. A method of lubricating a differential having improved lubrication of differential bearings as claimed in claim 1, characterized in that the method of lubricating includes, when the differential is mounted in a gearbox, reduction gearbox or gearbox, at low oil levels and/or low rotational speeds, by providing helical ribs on the differential housing and throwing lubricating oil from the helical ribs into the differential bearings on the side of the helical ribs.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911174816.5A CN110905990B (en) | 2019-11-26 | 2019-11-26 | Differential mechanism for improving bearing lubrication of differential mechanism and lubrication method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911174816.5A CN110905990B (en) | 2019-11-26 | 2019-11-26 | Differential mechanism for improving bearing lubrication of differential mechanism and lubrication method |
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| CN110905990A CN110905990A (en) | 2020-03-24 |
| CN110905990B true CN110905990B (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911174816.5A Active CN110905990B (en) | 2019-11-26 | 2019-11-26 | Differential mechanism for improving bearing lubrication of differential mechanism and lubrication method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1312720A (en) * | 1969-07-11 | 1973-04-04 | Eaton Axles Ltd | Axle drive mechanism having lubrication system |
| JPH0351556A (en) * | 1989-07-19 | 1991-03-05 | Tochigi Fuji Ind Co Ltd | Power transmission device |
| JPH1082430A (en) * | 1996-09-06 | 1998-03-31 | Tochigi Fuji Ind Co Ltd | Conical friction clutch, laser hardening method of its conical surface and differential gear used conical friction clutch to differential motion restriction mechanism |
| CN1532436A (en) * | 2003-03-19 | 2004-09-29 | �ղ��Զ�����ʽ���� | Differential mechanism and differential mechanism shell |
| JP2016089861A (en) * | 2014-10-30 | 2016-05-23 | アイシン精機株式会社 | Speed reducer lubrication structure |
| DE102015224614A1 (en) * | 2015-12-08 | 2017-06-08 | Zf Friedrichshafen Ag | Differential housing for a differential gear and differential gear with a multi-disc brake |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205446608U (en) * | 2015-12-30 | 2016-08-10 | 青特集团有限公司 | Single reduction drive axle differential mechanism left side shell for heavy hauler |
-
2019
- 2019-11-26 CN CN201911174816.5A patent/CN110905990B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1312720A (en) * | 1969-07-11 | 1973-04-04 | Eaton Axles Ltd | Axle drive mechanism having lubrication system |
| JPH0351556A (en) * | 1989-07-19 | 1991-03-05 | Tochigi Fuji Ind Co Ltd | Power transmission device |
| JPH1082430A (en) * | 1996-09-06 | 1998-03-31 | Tochigi Fuji Ind Co Ltd | Conical friction clutch, laser hardening method of its conical surface and differential gear used conical friction clutch to differential motion restriction mechanism |
| CN1532436A (en) * | 2003-03-19 | 2004-09-29 | �ղ��Զ�����ʽ���� | Differential mechanism and differential mechanism shell |
| JP2016089861A (en) * | 2014-10-30 | 2016-05-23 | アイシン精機株式会社 | Speed reducer lubrication structure |
| DE102015224614A1 (en) * | 2015-12-08 | 2017-06-08 | Zf Friedrichshafen Ag | Differential housing for a differential gear and differential gear with a multi-disc brake |
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| CN110905990A (en) | 2020-03-24 |
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